Contractions. - Atrop. Atp.

Present name. - Atropia. C17H13No3.

An alkaloid obtained from Belladonna, especially from the root. The process for preparing it is complex, and the substance is best obtained from the operative chemists.

Characters and Tests. - Colourless acicular crystals, sparingly soluble in water, more readily in alcohol and in ether. Its solution in water has an alkaline reaction, gives a citron-yellow precipitate with Ter-chloride of Gold, has a bitter taste, and powerfully dilates the pupil. It leaves no ash when burned with free access of air. It is an active poison.

Preparations. - Trituration. Solution in rectified spirit.

Reference to Horn. Proving. - Homop. Klinik, Jahrg, 1855.

Proper forms for dispensing. - 3x to 3, Trituration. 3x and upwards, Tincture, Pilules, or Globules.